4008689378 has 4 divisors (see below), whose sum is σ = 6013034070. Its totient is φ = 2004344688.

The previous prime is 4008689339. The next prime is 4008689381. The reversal of 4008689378 is 8739868004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2927134609 + 1081554769 = 54103^2 + 32887^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002172343 + ... + 1002172346.

Almost surely, 2^4008689378 is an apocalyptic number.

4008689378 is a deficient number, since it is larger than the sum of its proper divisors (2004344692).

4008689378 is a wasteful number, since it uses less digits than its factorization.

4008689378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004344691.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The square root of 4008689378 is about 63314.2115010524. The cubic root of 4008689378 is about 1588.5496812779.

The spelling of 4008689378 in words is "four billion, eight million, six hundred eighty-nine thousand, three hundred seventy-eight".